Wideband eight‐element antenna for 5G metal frame mobile phone applications

2020 ◽  
Vol 30 (12) ◽  
Author(s):  
Lin Guo ◽  
Zheng Liu ◽  
Heng Liu ◽  
Daiwei Huang ◽  
Zhengwei Du
Keyword(s):  
Mobile Phone ◽  
Mobile Phone Applications ◽  
Metal Frame

scholarly journals Compact Antenna for 4G/5G Metal Frame Mobile Phone Applications Using a Tuning Line

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 439 ◽  
Author(s):  
Daiwei Huang ◽  
Zhengwei Du ◽  
Yan Wang
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Coupled Line ◽  
Compact Antenna ◽  
Ground Clearance ◽  
Lower Band ◽  
Mobile Phone Applications ◽  
Metal Frame

A compact antenna with a 6 mm ground clearance for 4G and 5G metal frame mobile phones is proposed in this paper. The proposed antenna consists of a coupled line, a ground branch, a monopole branch, and a tuning line. The ground branch and the coupled line are used to obtain the lower band (698–960 MHz), the monopole branch is used to improve the match at the lower band and obtain the higher band (1710–2690, 3400–3800 MHz), and the tuning line is used to improve the match at the higher band. The novelty of the proposed antenna is that more modes are excited and work together to obtain multiple working bands, by using the coupled line and the folded branches with the help of the tuning line, and then nine bands are obtained under the conditions of a 6 mm, only, ground clearance and a metal frame environment. A prototype has been fabricated and measured. The measured −6 dB impedance bandwidths are 345 MHz (0.685–1.03 GHz) and 2.16 GHz (1.67–3.83 GHz) at the lower and higher bands, respectively. The LTE700, GSM850, GSM900, DCS, PCS, UMTS, LTE2300, and LTE2500 bands for 2G, 3G, 4G, and the 3.5 GHz band that is possible for 5G are covered. The measured efficiencies and patterns are also presented.

A SYSTEMATIC ANALYSIS OF THE EFFECTS OF MOBILE PHONE APPLICATIONS ON PHYSICAL ACTIVITY

2020 ◽  
Vol 2020 ◽  
pp. 1483-1484
Author(s):  
Masoumeh Hosseinpour ◽  
◽  
Ralf Terlutter ◽  
Holger Roschk
Keyword(s):  
Physical Activity ◽  
Mobile Phone ◽  
Systematic Analysis ◽  
Mobile Phone Applications

Implementasi Keamanan pada Transaksi Data Menggunakan Sertifikat Digital X.509

2017 ◽  
Vol 8 (1) ◽  
pp. 1-10
Author(s):  
Is Mardianto ◽  
Kuswandi Kuswandi
Keyword(s):  
Mobile Phone ◽  
Web Service ◽  
Data Exchange ◽  
User Authentication ◽  
Digital Certificate ◽  
Security Issues ◽  
Diffie Hellman ◽  
Digital Certificates ◽  
Mobile Phone Applications ◽  
Secure Hash Algorithm

Security issues have become a major issue on the Internet. One of the security methods that are widely used today is to implement a digital certificate. Digital certificates have evolved over time, one of which is the X.509 digital certificate. Digital certificates have been widely used as authentication applications, web network authentication and other authentication systems that require digital certificates. This research is carried out by implementing an X.509 digital certificate technology as a mobile web service with its client. Secure Hash Algorithm (SHA), Diffie-Hellman, and Advanced Encryption Standard (AES) are used to secure the data exchange transaction between the web service and mobile phone. SHA algorithm will be used for user authentication, Diffie-Hellman algorithm will be used for public key exchange and AES algorithms will be used for symmetric cryptography data. The results of the application of digital certificates, the SHA algorithm, Diffie-Hellman, and AES in mobile phone applications, provide security application running on web service. Index Terms—Digital Certificate, X.509, SHA, Diffie Hellman, AES

Mobile phone applications in academic library services: a students' feedback survey

2006 ◽  
Vol 23 (1) ◽  
pp. 35-51 ◽  
Author(s):  
Nor Shahriza Abdul Karim ◽  
Siti Hawa Darus ◽  
Ramlah Hussin
Keyword(s):  
Mobile Phone ◽  
Academic Library ◽  
Library Services ◽  
Mobile Phone Applications
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